Toshiba Strata Dk14, Dk40i, Dk424 Installation And Maintenance Manual

							Fault Finding
Station Cable Continuity Check
Strata DK I&M 5/9912-9
Fault Finding
Cable Installation Test
If cable voltmeter and ohmmeter tests are within limits, digital telephones, DDCBs, or DDSS 
consoles may not operate.
ä
To perform the cable installation test
1. Cable runs for the above digital devices must be free of cable splits (single or double). Test for 
and eliminate all cable splits.
2.Cable bridge taps – Digital telephones will not operate if cable runs contain any type (short or 
long) of cable bridge. Test for and eliminate all cable bridges. 
3. When installing the station cable, do not run parallel to and within 3 ft. of an AC power line. 
AC power lines should cross at right (90°) angles only. In particular, avoid running station 
wire pairs near devices that generate electrical noise, such as neon or fluorescent light fixtures.
4.For DK40i: Chapter 3 – DK40i Installation, Table 3-10 on Page 3-39. Verify that your 
telephone is wired correctly (2-pair or External power) for the options it supports (ADM, 
RPCI-DI, PDIU-DI, HHEU, DVSU, etc.).
Table 12-3 Station Cable Continuity Check for Digital Telephone Cables using Ohmmeter
FromToVoltagePairWireColorPairWireColor
1TGreen12 T Black open
1 R Red 2 T Black open
1 T Green 2 R Yellow open
1 R Red 2 R Yellow open
1 T Green 1 R Red 40 ohms
2
2 T Black 2 R Yellow 40 ohms2
Table 12-4 Station Cable Continuity Check for Electronic Telephone Cables using Ohmmeter
FromToVoltagePairWireColorPairWireColor
1TGreen1
1. The green-red, black-yellow and white-blue measurements should be within 10% 
of each other.
2 T Black open
1 R Red 2 T Black open
1 T Green 2 R Yellow open
1 R Red 2 R Yellow open
1 T Green 1 R Red 40 ohms
2
2. This is the maximum allowable reading for all digital and electronic telephone 
cable runs except if connecting an HDSS console to circuits 7 and 8 of a PEKU, 
then the maximum cable restriction is 20 ohms, not 40 ohms.
2 T Black 2 R Yellow 40 ohms2
3 T White 3 R Blue 40 ohms2
3 T White 1 R Red open
3 R Blue 1 R Red open
3 T White 1 T Green open
3 R Blue 1 T Green open
3 T White 2 T Black open
3 R Blue 2 T Black open
3 T White 2 R Yellow open 
						

							Fault Finding
Fault Isolation Flowcharts
12-10Strata DK I&M 5/99
Fault Isolation Flowcharts
The following troubleshooting flowcharts are available to aid in fault isolation. Toshiba 
recommends reading the previous text in this chapter before proceeding to Flowchart 12-1 on Page 
10 to begin fault isolation.
START
Please read 
Chapters 2 and 3 
before 
proceeding.
Is the
system completely
non-operational?
Is it a station
no dial tone
fault?
Is it a CO
line no dial
tone fault?
Is a DSS
console non-
operational?
Is it a
voice mail/auto
attd fault?
Is it
an SMDR
fault?
1-1
Call your 
technical support
group.
No No
No
No
No
Is it a
remote 
maintenance
fault?
Is the fault
classified on
this page?
No
No
1-1
No
Yes
Yes
Yes
Yes
Yes
YesYes
Yes
1879
Go to
Flowchart
12-2
Go to
Flowchart
12-8
Go to
appropriate
Flowchart
12-1~12-12
Go to
Flowchart
12-3
Go to
Flowchart
12-4
Go to
Flowchart
12-5
Go to
Flowchart
12-6
Go to
Flowchart
12-7
Flowchart 12-1 Fault Classification 
						

							Fault Finding
Fault Isolation Flowcharts
Strata DK I&M 5/9912-11
Fault Finding
Flowchart 12-2 Catastrophic Faults
START
Is the system
completely
non-operational?
Was the fault
isolated by completing
the system hardware
check?
Was the
fault cleared
after re-initializing
the system?
Call your
technical support
group. Does the fault
re-occur after
entering customer
database? Reprogram customer
database, one program
at a time, and check
to see if fault re-occurs.Tag the defective
unit(s) and return
for repair.
2-1
2-2
2-5
2-6
2-82-3
Go to
Flowchart
12-1
2-4
2-7
END
END
No
Yes
Yes
No
No Yes
Yes
NoTest the Power Supply as described 
in the installation sections of DK14 
and DK40i and in this chapter for 
DK424.  Also perform Hardware 
Fault Isolation per this chapter.
1880
Re-initialize the system 
(Programs 91-9 and 03) 
and re-check fault using 
default program data (do 
not enter customer 
database). 
						

							Fault Finding
Fault Isolation Flowcharts
12-12Strata DK I&M 5/99
Flowchart 12-3 Station Dial Tone Faults
START
Repair if necessary.
Is the fault
cleared?3-1 END Yes
Is the 
faulty station on a 
replaceable station 
PCB?
3-2
Replace the PCB
and retest
3-3 
Replace the DK14 or DK40i 
Base KSU. Or, test the DK424 
common control PCB per the 
Fault Isolation section. Initialize 
the DK424/DK40i system
(Prog: 91-9 and 03).
Are the  
faulty station(s) 
only in the DK40i 
Expansion KSU or only 
one DK424 
cabinet?
Is the
fault
cleared?3-7
No
Retest.
3-5Yes
Is the
fault
cleared?Yes
3-6
END
Go to
3-4
Go to
3-4
Call your technical
support group. No
YesNo
NoNo
3-8 Yes
Is the fault
cleared?NoYes3-4
Replace the defective 
unit and return it to the 
repair center
DK14: QCDU, 
QSTU2
DK40i Base KSU: 
KSTU2 and all PCBs 
in the DK40i 
Expansion Unit
DK424: PEKU, 
PESU, PSTU, RSTU, 
RDSU/RSTS, PDKUReplaceable Station 
PCBs:Check station wiring
per the Station Cable 
Continuity Check in this 
chapter.
1881
Change the DK40i 
Expansion KSU and  
retest or check the  
cabinet power supply 
per the RPSU280 
power  supply test. 
Then replace the 
DK424 cabinet 
						

							Fault Finding
Fault Isolation Flowcharts
Strata DK I&M 5/9912-13
Fault Finding
Flowchart 12-4 CO Line Dial Tone Faults
Is the
fault
cleared?
Go to
4-5
Call your technical
support group.NoNo
Yes
Yes
Retest.
Change the DK14 or DK40i Base KSU or test 
the DK424 common control PCB per the Fault 
Isolation section and initialize the system 
(Prog. 91-9 and 03).Is the
fault
cleared?Go to
4-5
4-7
No
No Are the 
faulty CO lines 
only in the DK40i 
Expansion KSU or one 
DK424 Cabinet?
4-10
4-5 Is the
fault
cleared?
4-4
Yes
START
Is the fault
cleared?
4-1
4-2END
No
Are all 
faulty CO lines 
on a replaceable PCB 
(not including KSU 
motherboard)?
Yes
Change the PCB
 and retest.4-3
Yes 1.
2.
No
Replace the defective 
unit and return it to the 
repair center.
END
4-9 Yes
Change the expansion 
unit and retest.
4-6DK14
DK40i Base 
KSU:
DK40i only:
DK40i 
Expansion 
KSU/ DK424:
DK424 onlyReplaceable CO Line 
PCBs:
1882
Check CO line wiring per Chapter 8.
Test central office line using a 
standard telephone or butt set at the 
TELCO block.
          Repair as necessary.
QCDU
KCOU
TCOU
TDDU
KCDU
RCOU
RCIU2
REMU
RDDU 
PCOU
REMU 
RCOS 
RGLU 
						

							Fault Finding
Fault Isolation Flowcharts
12-14Strata DK I&M 5/99
Flowchart 12-5 DSS Console Faults
START
DSS
console
type?
5-0
END DDSS
Go to
5-0
Is the correct
PCB slot code entered
in Program 03?Enter correct PCB slot
code using Program 03;
then turn power OFF
(for 5 seconds) and
then ON.
5-3
Refer to Chapter 8 and verify wiring:
Is the
fault
cleared?Yes
5-4
Go to
5-3
HDSS
No
On PEKU connected
to HDSS, set SW1
to the DSS position.
5-1 No
5-2
Is the
fault
cleared?•
•For DDSS, circuit 8 of the base
unit or PDKU (KCDU does not 
support DDSS).
For HDSS, circuit 7 and 8 of 
PEKU (PESU does not support
HDSS).
Correct as necessary.
Correct as necessary.
Is the
fault
cleared?Yes
5-5
Call your technical
support group.No
END
END
No
Yes
Yes
1883
Test DSS cable with cable continuity 
checks in this chapter.
NoteDSS is not available on DK14. 
						

							Fault Finding
Fault Isolation Flowcharts
Strata DK I&M 5/9912-15
Fault Finding
Flowchart 12-6 Voice Mail/(External) Auto Attendant Faults 
Is the
fault
cleared?Yes
END
START
This chart assumes
the VM/AA device
has no faults.
Is the
fault
cleared?Yes
6-3
No
6-2
Is VM/AA 
integration completely
non-operational?
END Yes
Read “Voice Mail Options” in Chapter 10 and 
the programming instructions for: 
DK14/DK40i: 03 (Code 92, slot 00 for 
K4RCU3) DK424: 03 (Code 92~94 for  RCTU 
PCB) DK14/DK40i/DK424: 15-0 and 15-3 
(Auto release), and 31 (LEDs: 04, 05, 09, 
15~20). This explains system hardware and 
programming options related to VM and 
external auto attendant.
Correct Hardware/System Programming as 
necessary.
Check that the VM I.D. codes (656 and 
657) are stored correctly in users’ digital or 
electronic telephones. Use operating 
procedures in the manual for instructions.
6-1
Check that the QRCU3 (DK14), 
K5RCU (DK40i) or RRCS (DK424) is 
installed correctly and programmed 
with Code 92 in Prog. 03 (DK40i) or 
Code 92, 93, and 94 in Prog. 03 
(DK424).  
No
Check that VM/AA ports are connected to 
standard telephone station ports correctly. 
(Refer to QSTU2 (DK14), KSTU2 (DK40i 
only). DK40i/DK424 RSTU2, PSTU, PESU, 
and for the DK424 only, RDSU/RSTS wiring 
diagrams in Chapter 8.)
Correct if necessary.
Is the
fault
cleared?Yes
6-4
No
END
Is the
fault
cleared?Yes
6-5
No
END
Call your technical 
support group.
Using a standard DTMF 
telephone, check all standard 
telephone circuits (QSTU2, 
KSTU2,RSTU2, PSTU2, PESU).
Replace defective PCB if 
necessary.
Other VM/AA related programs:
• 10-2, LED 11 – No DTMF tones
• 13 – Message center
• 33 – Station hunting
• 35 – Busy station transfer/ringing
• 36 – Fixed call forward
• 37 – Ring transfer recall time
6-6 No
1884 
						

							Fault Finding
Fault Isolation Flowcharts
12-16Strata DK I&M 5/99
Flowchart 12-7 Station Message Detail Recording (SMDR) Faults
START
No 
SMDR data or 
garbled data is 
detected at the QSMU, 
WSIU/TSIU/PIOU/PIOUS/
RSIU/RSIS SMDR port.
7-1
Is the
fault
cleared?Yes
7-5
No
This chart assumes
the SMDR device
has no faults.
No
END Yes
Read the SMDR 
installation 
instructions in this 
chapter before 
proceeding with this 
chart.
SMDR
data records are
sent correctly but not
when the customer
requires.
7-2Yes
Set SMDR options in
Program 60: Threshold
time, long distance 
calls only, etc.
Is the
fault
cleared?
Yes
7-3
END
7-4
Is the
fault
cleared?Yes
7-6
No
END
7-7
Check that the SMDR device
is wired correctly to the 
WSIU/RSIU/RSIS/TSIU/PIOU/
PIOUS SMDR port. (Refer to 
PIOU or PIOUS wiring 
instructions in Chapter 8.)
Fix as required.
Is the
fault
cleared?Yes
7-8
No
END
Is the
fault
cleared?Yes
7-9
No
END
Call your technical 
support group. No
No other faults are 
classified. Call your 
technical support 
group for assistance.
No
DK40i/DK424: The SMDR port is 
the bottom modular jack (TTY is 
on top) of WSIU (DK14) or TSIU 
(DK40i only) /PIOU/PIOUS.
DK424: SMDR can be any jack on 
RSIU or RSIS. See Program 76.
The modular cord connecting to 
the SMDR port must be 6-wires.Verify that the SMDR device 
communication parameters are set 
for: 8-data bits, no-parity, 1-stop bit, 
300 or 1200 bps. RSIU/RSIS 1200, 
2400, 4800 and 9600
Change as required.
Change the 
PIOU/RSIU/RSIS/TSIU 
PIOUS PCB. •
•
•
Call your technical 
support group.
Verify that the PIOU/PIOUS, WSIU (DK14), or 
TSIU (DK40i only) baud rate SW1 switch is in 
the correct position (300 bps or 1200 bps) to 
match the SMDR device baud rate. (Refer to 
TSIU/PIOU/PIOUS installation in Chapter 7.)
If using RSIU/RSIS with DK424, verify 
Program 76-1 for port assignment. Verify baud 
rate in Program 76-2 
Change as required.
1885 
						

							Fault Finding
Fault Isolation Flowcharts
Strata DK I&M 5/9912-17
Flowchart 12-8 Remote Maintenance Faults
START
Is Remote
Maintenance connection
via external modem on TTY
port or IMDU
modem?IMDU modem installed on
PIOU or PIOUS
8-1
END This chart assumes that the remote 
terminal and modem have no fault and that 
Remote Maintenance does not operate.
Is the
fault
cleared?
Call your technical 
support group.
If a digital or electronic telephone 
is in the Programming mode, it is 
not possible to enter the Remote 
Maintenance mode.
8-5
8-4
Is the
fault
cleared?
8-3
Check that the WSIU/TSIU/PIOU/PIOUS SW3 
switch is in the TTY position. For DK424, 
check Program 76-1 and verify the port is 
programmed as a 1 for TTY.
Correct as necessary.
8-2
YES
NO
Check that the modem or terminal connected 
to the TTY port is wired correctly per the  
WSIU/TSIU/PIOU/PIOUS, RSIU/RSIS, RSSU 
MDF wiring in Chapter 8.
Correct above if necessary or replace WSIU, 
TSIU, PIOU, PIOUS, or RSIU/RSIS.The TTY port is the top modular 
jack (SMDR is bottom) of the 
PIOU/PIOUS.
The modular cord connecting the 
TTY port to the terminal or external 
modem must be 6-wires.
TTY can be any jack on 
RSIU/RSIS—see Program 76. •
•
• Check that the baud rate switch (SW2, push-button switch on PIOU/PIOUS) is set to match the remote 
terminal baud rate (300 bps LED ON, 1200 bps LED OFF) . 
DK40i: check that the WSIU, TSIU, IMDU, PIOU, or PIOUS is installed correctly.
DK424: check that the RSIU, RMDS, IMDU, RSSU, PIOU or PIOUS is installed correctly.
If using RSIU/RSIS/RMDS, check that Program 76 settings match DKAdmin/DKBackup PC and modem 
or remote terminal/modem.
Check that communication parameters of remote terminal are set to match the PIOU or PIOUS TTY 
port or IMDY (7-data bits, even parity, 1-stop bit).
External modem connected 
to the WSIU, TSIU, PIOU, 
PIOUS TTY port
Check that the communication parameters of 
the remote terminal are set to match the
IMDU (7-data bits, even parity, 1-stop bit).
Check that the PIOU/PIOUS SW3
switch is in the MODEM position.
Enable the IMDU by turning LED 14 ON in 
Program 77-1.
    If required, assign CO lines for DISA or to      
ring IMDU in  system Program 78, Code 
51~53.
When calling IMDU or RMDS via DISA or 
ring transfer, dial #19.
If calling RMDS or IMDU via DID lines, call 
the sttion number assigned to Port 085 
(RCTUB) or Port 245 (RCTUC/D) in 
Program *09 or 71, 72 and 73.
 
Correct above if necessary or
replace IMDU or PIOU(S). •
•
•
 
1886 
						

							Fault Finding
Fault Isolation Flowcharts
12-18Strata DK I&M 5/99